.km-app{
  --km-bg:#f7f8fc;
  --km-card:#fff;
  --km-text:#243047;
  --km-sub:#6f7890;
  --km-line:#e4e8f1;
  --km-accent:#5c6cff;
  --km-accent-soft:#eef0ff;
  --km-ok:#179c63;
  --km-ok-soft:#e8f8f0;
  --km-ng:#d95555;
  --km-ng-soft:#fff0f0;
  max-width:980px;
  margin:24px auto;
  padding:24px 18px 36px;
  border-radius:24px;
  background:linear-gradient(180deg,#fbfcff 0%,var(--km-bg) 100%);
  color:var(--km-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic UI","Yu Gothic",Meiryo,sans-serif;
}
.km-app *{box-sizing:border-box}
.km-header{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;margin-bottom:18px}
.km-title{font-size:clamp(24px,4vw,36px)!important;margin:0 0 4px!important}
.km-lead{margin:0!important;color:var(--km-sub);font-size:14px}
.km-stats{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.km-stats span{background:#fff;border:1px solid var(--km-line);border-radius:999px;padding:7px 11px;font-size:13px}
.km-panel{background:#fff;border:1px solid var(--km-line);border-radius:18px;padding:14px;box-shadow:0 10px 30px rgba(31,42,68,.08)}
.km-section-title{font-size:13px;font-weight:800;color:var(--km-sub);margin:2px 0 8px}
.km-section-title:not(:first-child){margin-top:14px}
.km-levels,.km-categories{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.km-option{border:1px solid var(--km-line);background:#fff;border-radius:12px;padding:11px 8px;font-weight:700;color:var(--km-text);cursor:pointer;transition:.15s}
.km-option:hover{transform:translateY(-1px)}
.km-option.is-active{background:var(--km-accent);border-color:var(--km-accent);color:#fff}
.km-level-note{margin:9px 2px 0!important;font-size:12px;color:var(--km-sub)}
.km-guide{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:18px 2px 12px}
.km-guide strong{font-size:16px}
.km-guide span{color:var(--km-sub);font-size:13px}
.km-board{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);gap:14px}
.km-column{display:grid;gap:10px}
.km-choice{width:100%;min-height:72px;text-align:left;border:2px solid transparent;background:#fff;border-radius:16px;padding:14px 16px;box-shadow:0 6px 18px rgba(31,42,68,.06);color:var(--km-text);font-size:15px;font-weight:650;line-height:1.55;cursor:pointer;transition:transform .12s,border-color .12s,background .12s,opacity .25s}
.km-choice:hover{transform:translateY(-1px);border-color:#cfd5ff}
.km-choice.is-selected{border-color:var(--km-accent);background:var(--km-accent-soft)}
.km-choice.is-correct{border-color:var(--km-ok);background:var(--km-ok-soft)}
.km-choice.is-wrong{border-color:var(--km-ng);background:var(--km-ng-soft);animation:km-shake .22s linear}
.km-choice.is-matched{opacity:0;pointer-events:none;transform:scale(.96)}
.km-term{font-size:17px}
.km-footer{margin-top:18px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.km-message{min-height:44px;display:flex;align-items:center;color:var(--km-sub);font-weight:700}
.km-message.is-ok{color:var(--km-ok)}
.km-message.is-ng{color:var(--km-ng)}
.km-btn{border:0;border-radius:13px;padding:12px 18px;font-weight:800;cursor:pointer;background:var(--km-accent);color:#fff}
.km-btn-sub{background:#fff;color:var(--km-text);border:1px solid var(--km-line)}
.km-complete{display:none;margin-top:18px;background:#fff;border:1px solid var(--km-line);border-radius:18px;padding:24px;text-align:center;box-shadow:0 10px 30px rgba(31,42,68,.08)}
.km-complete.is-show{display:block}
.km-complete h3{margin:0 0 8px!important;font-size:25px}
.km-complete p{color:var(--km-sub)}
.km-complete-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
@keyframes km-shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
@media(max-width:720px){
  .km-header{align-items:flex-start;flex-direction:column}
  .km-stats{justify-content:flex-start}
  .km-levels,.km-categories{grid-template-columns:repeat(2,1fr)}
  .km-board{grid-template-columns:1fr 1.15fr;gap:9px}
  .km-choice{min-height:76px;padding:12px 11px;font-size:13px}
  .km-term{font-size:15px}
  .km-guide{align-items:flex-start;flex-direction:column;gap:3px}
}
@media(max-width:470px){
  .km-app{padding:18px 10px 32px}
  .km-board{gap:7px}
  .km-choice{padding:11px 9px;border-radius:13px}
}